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公开(公告)号：US4062705A
公开(公告)日：1977-12-13
申请号：US492754
申请日：1974-07-29
CPC分类号： C21D9/50 , B23K35/3053 , Y10T428/12493
摘要： A method for obtaining a weld metal having excellent toughness at low temperatures as below -40.degree. C, which method comprises heating the weld metal having a specific steel composition to its austenitizing temperature and cooling it or holding it at the temperature for not longer than 25 minutes and then quenching and tempering it. In order to further improve the low temperature toughness, the weld metal is reheated again to the Ac.sub.1 to Ac.sub.3 range. Excellent low temperature toughness of the weld metal can be obtained without the necessity of using any special welding materials.
摘要翻译： 一种获得在低于-40℃的低温下具有优异韧性的焊接金属的方法，该方法包括将具有特定钢组成的焊接金属加热至其奥氏体化温度并冷却或将其保持在不超过25℃的温度 几分钟，然后淬火回火。 为了进一步提高低温韧性，将焊接金属再次加热至Ac1〜Ac3的范围。 无需使用任何特殊的焊接材料即可获得焊接金属的优异的低温韧性。
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公开(公告)号：US4115675A
公开(公告)日：1978-09-19
申请号：US802195
申请日：1977-05-31
CPC分类号： C21D9/08
摘要： A method for heating steel pipe for induction heating coils, while the pipe is travelling through said coils in the axial direction, which comprises:(a) calculating the limit absorption electric power density Po (W/cm.sup.2) by the followng formula:Po = 1/40 x T x .sqroot.dwhere T = heating temperature (.degree. C) and d = wall thickness (mm);(b) attaching a power supply of low frequency to the induction heating coils;(c) setting said power supply for maximum capacity to be impressed to said induction heating coils, and(d) heating the steel pipe as it is travelling through said induction heating coils heated by said power supply, at such speed as to permit the steel pipe to be heated to the desired temperature, and heating the steel pipe with the set power if the absorption electric power density P by the set power is P .gtoreq. Po, and heating the steel pipe by shortening the effective length of the induction heating coils to obtain P .gtoreq. Po if P .ltoreq. Po; thereby causing the difference in the temperature between the ends and the central portion of the steel pipe in the axial direction to be no greater than about 20.degree. C.
摘要翻译： 一种用于加热感应加热线圈的钢管的方法，同时管道沿轴向行进通过所述线圈，其包括：
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公开(公告)号：US3973999A
公开(公告)日：1976-08-10
申请号：US595310
申请日：1975-07-11
摘要： A method for producing a high tensile strength and toughness bend pipe in which a heat treatment is done as a pretreatment prior to bending, and a tempering treatment is done, if necessary, after the bending, and the bend pipe produced by the present invention is useful for pipe line construction and shows excellent properties at low temperatures.
摘要翻译： 制造弯曲前的预处理进行热处理的高抗拉强度和韧性弯曲管的方法，如果需要，进行回火处理后的弯曲，本发明制造的弯曲管是 适用于管线施工，在低温下表现出优异的性能。
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4.发明授权
公开(公告)号：US4138278A
公开(公告)日：1979-02-06
申请号：US826820
申请日：1977-08-22
申请人： Hajime Nakasugi , Hiroaki Masui , Hiroshi Tamehiro , Hiroo Mazuda
发明人： Hajime Nakasugi , Hiroaki Masui , Hiroshi Tamehiro , Hiroo Mazuda
CPC分类号： C22C38/12 , C21D8/0226 , Y10S72/70
摘要： A method for producing a steel sheet having excellent low-temperature toughness, comprising a step of heating to a temperature not higher than 1150.degree. C., a steel slab containing 0.01 - 0.13% C, 0.05 - 0.8% Si, 0.8 - 1.8% Mn, 0.01 - 0.08% total Al, 0.08 - 0.40% Mo and not more than 0.015% S with the balance being iron and unavoidable impurities, and a step of hot rolling the steel slab thus obtained by at least three passes with a minimum reduction percentage not less than 2% by each rolling pass in a temperature range of 900 - 1050.degree. C, a total reduction percentage not less than 50%, and with a finishing temperature not higher than 820.degree. C.
摘要翻译： 一种制造具有优异的低温韧性的钢板的方法，包括加热至1150℃以下的步骤，含有0.01〜0.13％C，0.05〜0.8％Si，0.8〜1.8％ Mn，0.01〜0.08％的总Al，0.08〜0.40％的Mo和不大于0.015％的S，余量为铁和不可避免的杂质，以及通过至少三道次热轧钢板的步骤， 在900-1050℃的温度范围内的轧制通过率不低于2％，总还原率不低于50％，最终温度不高于820℃。
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5.发明授权Process for producing a high tension steel sheet product having an excellent low-temperature toughness with a yield point of 40 kg/mm.sup.2 or higher 失效用于生产具有40KG / MM“2”或更高的等级的高强度低温韧性的高张力钢板产品的方法
公开(公告)号：US4105474A
公开(公告)日：1978-08-08
申请号：US786946
申请日：1977-04-12
申请人： Hajime Nakasugi , Hiroaki Masui , Hiroshi Tamehiro , Tetuo Takeda , Seiji Eiro
发明人： Hajime Nakasugi , Hiroaki Masui , Hiroshi Tamehiro , Tetuo Takeda , Seiji Eiro
CPC分类号： C21D8/0226 , C21D8/021 , C21D8/0263
摘要： The production process characterized in that a steel ingot or slab containing not less than 0.004% of TiN not larger than 0.02.mu. is heated to a temperature not higher than 1150.degree. C and rolled, and growth of the .gamma. grains during this heating and rolling step is prevented by TiN to improve the toughness, and the resultant steel product has an excellent low-temperature toughness with a yield point of 40 kg/mm.sup.2 or higher, and is useful as hot rolled or as heated at a temperature ranging from 300.degree. to 750.degree. C after the hot rolling.
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公开(公告)号：US3976514A
公开(公告)日：1976-08-24
申请号：US548617
申请日：1975-02-10
申请人： Kameo Matsukura , Kunio Watanabe , Yoshio Hashimoto , Masatoki Nakayama , Hajime Nakasugi , Tetuo Takeda
发明人： Kameo Matsukura , Kunio Watanabe , Yoshio Hashimoto , Masatoki Nakayama , Hajime Nakasugi , Tetuo Takeda
CPC分类号： C22C38/04 , C21D8/0226
摘要： A method for producing a high tensile strength steel plate which comprises subjecting to a low temperature rolling, a steel composition containing not more than 0.25% of carbon, not more than 0.5% of silicon, 0.5 to 2.0% of manganese, not more than 0.015% of sulfur, 0.005 to 0.1% of aluminum, one or more of niobium, vanadium and titanium in an amount not less than 0.01%, and REM in an amount not less than 1.3 times the amount of sulfur, with optionally one or more of nickel, chromium and copper, with the balance being iron and unavoidable impurities, which steel possesses a low notch toughness transition temperature and high absorbed energy in the notch-impact test, and is suitable in the as rolled condition for use as pipe lines in cold districts.
摘要翻译： 一种高强度钢板的制造方法，其特征在于，在低温轧制下，含有不超过0.25％的碳，不超过0.5％的硅，0.5〜2.0％的锰，不大于0.015 0.1％的硫，0.005〜0.1％的铝，不少于0.01％的铌，钒和钛中的一种或多种，REM量不小于硫的1.3倍，以及任选的一种或多种 镍，铬和铜，余量为铁和不可避免的杂质，该钢在缺口冲击试验中具有较低的缺口韧性转变温度和较高的吸收能，适用于冷轧管线的轧制条件 区。
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7.发明授权Process for producing high-tension bainitic steel having high-toughness and excellent weldability 失效具有高韧性和优异的焊接性的高张力贝氏体钢的制造方法
公开(公告)号：US4219371A
公开(公告)日：1980-08-26
申请号：US27393
申请日：1979-04-05
CPC分类号： C21D8/0226 , C22C38/04 , C21D2211/002
摘要： A process for producing high-tension bainitic steel having high-toughness and excellent weldability by subjecting a bainitic steel of a specific composition to a low-temperature heating and subsequently rolling the steel under specific conditions.
摘要翻译： 通过对特定组成的贝氏体钢进行低温加热，随后在特定条件下进行轧制，制造具有高韧性和优异焊接性的高张力贝氏体钢的方法。
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8.再颁专利Process for producing a high tension steel sheet product having an excellent low-temperature toughness with a yield point of 40 kg/mm.sup.2 or higher 失效具有优异的低温韧性，屈服点为40kg / mm 2以上的高张力钢板制品的制造方法
公开(公告)号：USRE31251E
公开(公告)日：1983-05-24
申请号：US207068
申请日：1980-11-14
申请人： Hajime Nakasugi , Hiroaki Masui , Hiroshi Tamehiro , Tetuo Takeda , Seiji Eiro
发明人： Hajime Nakasugi , Hiroaki Masui , Hiroshi Tamehiro , Tetuo Takeda , Seiji Eiro
CPC分类号： C21D8/0226 , C21D8/021 , C21D8/0263
摘要： The production process characterized in that a steel ingot or slab containing not less than 0.004% of TiN not larger than 0.02.mu. is heated to a temperature not higher than 1150.degree. C. and rolled, and growth of the .gamma. grains during this heating and rolling step is prevented by TiN to improve the toughness, and the resultant steel product has an excellent low-temperature toughness with a yield point of 40 kg/mm.sup.2 or higher, and is useful as hot rolled or as heated at a temperature ranging from 300.degree. to 750.degree. C. after the hot rolling.
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公开(公告)号：US4142713A
公开(公告)日：1979-03-06
申请号：US797116
申请日：1977-05-16
摘要： In the method of heat-treatment of welded pipe having a reinforcement weld bead therealong by heating the pipe by using an induction heating device and then by cooling it, the bead which has just been heated by the induction heating device, is further heated by a bead heater to a temperature such that the temperature difference between the metal of the pipe and the bead is smaller than a temperature difference which will produce a bad influence on the quality of the pipe.In the apparatus for heat-treatment of welded pipe having a reinforcement weld bear therealong by heating and then by cooling the pipe respectively by a heating device and a cooling device arranged in the direction of travel of the pipe, there is provided between the heating device and the cooling device a temperature-difference detector for detecting the temperature difference between the metal of the pipe and the bead, and also a bead heater for heating the bead so as to make the temperature difference between the metal of the pipe and the bead smaller than the aforementioned temperature difference.
摘要翻译： 在通过使用感应加热装置加热管道然后通过冷却将具有加强焊道的焊接管热处理的方法中，刚刚被感应加热装置加热的焊道进一步被加热 胎圈加热器的温度使得管子和胎圈的金属之间的温度差小于对管子质量产生不良影响的温度差。
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公开(公告)号：US3979231A
公开(公告)日：1976-09-07
申请号：US546783
申请日：1975-02-03
IPC分类号： B21C37/08 , B21C37/30 , B21D3/14 , B21D7/16 , B21D9/08 , B21D39/08 , C21D8/10 , C21D9/08 , C21D9/14
摘要： A method for producing a large diameter steel pipe having excellent shape, toughness and tensile strength by subjecting the pipe to descaling and to heat treatment which involves heating the steel pipe locally successively from one end to the other end of the steel pipe in the axial direction and forcedly cooling the pipe, and then expanding the steel pipe after the heat treatment.
摘要翻译： 一种通过对管道进行除鳞和热处理的具有优异的形状，韧性和拉伸强度的大直径钢管的制造方法，该方法涉及从钢管的一端到另一端在轴向上局部连续地加热钢管 并强制冷却管道，然后在热处理后扩大钢管。
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